William Miles

William "Bill" Miles (born 1948) was a member of the Assassin Order, who acted as a contact for the Assassin teams spread throughout the world. Based in the Assassin headquarters, he regularly kept the teams informed about the situation of the others. He has one son, Desmond. In overseeing compounds he has also trained Lucy in her childhood (mentioning it briefly in one of his dialogs). He also gave Desmond the email passwords of his partners so that he could monitor their emails.

It's revealed in Desmond's Journey that William trained his son very strictly to be an assassin such as making him run for miles every day and told him how much of a foothold Abstergo Industries has on the world.